Double-acting pump



mmm: `ACTING PUMP Original Filed Aug. 1926 Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

ANDREW P. MORRIS, OFSNYDEB, TEXAS, ASSIGNOR OF ONE-TENTH TO C. FRANKSENTELL, OF SNYDER, TEXAS. A

novena-ACTING PUMP.

Continuation of application Serial No. 131,922, led August 24, 1926.This application filed November 8, 1927. Serial No. 231,859.

is to provide al1-improved construction which will enable the lunger rodand, all attachments thereto, to e pulled or withdrawn from the pumpbarrel and the well tubing without pullingor drawing the pump barrel orthe tubing from the well.

. Anotherl object is to provide for a maximum v flow of liquid from thepump barrel.

Reference is made to the accompanying drawings which form a part of thisapplication. f

Figure 1 is a vertical section of a well casing having pum ing meanstherein constructed in accor ance with the present 1nvention.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a horizontal section taken on the line 3-3 of Figure 1, and

Figure 4 is a perspective view of the ring valve for the upper end ofthe pump barrel.

Similar characters of reference are used to indicate the same partsthroughout the several views.

Within the well casingll 1s arranged a pump barrel 2 provided at t e uper end with a couplin sleeve and compose of two sections 3 and 4 avingthreaded connection wlth each other. Discharge pipe orwell tubing 5screws into the upper sleeve section 3, and provided within the latteris an upper check valve 6,v

which is adapted to engage seat 7 provided in said section 3. The checkvalve 6 has a central bore through which a hollow plunger or piston rodsection 8 travels freely. Sleeve section 4 screws onto the u per end pfbarrel 2 and is provided with axia IyeXteHdm ports 9 through 'which thebarrel 1s charge with liquid as the piston 10 of rod section 8 underoesits down stroke, on which stroke the liquid in the barrel 2 below thepiston is discharged through hollow piston rod section 8 into dischargepipe or tubing 5.

In the lower end of hollow piston 10 isa check valve 11 by which theliquid passes into rod section 8 when the down stroke is made. Thepiston 1() is provided with cup leathers turned up and down, as shown.

The upper end of hollow piston rod sectiony i 8 connects to the suckerrod 12 by means of a cage connection 13, allowing liquid passing throughhollow piston rod section 8 to pass into discharge pipe or tubing 5 atthis point.

On the up stroke of hollow piston 10, barrel 2 is charged with liquidbelow the piston through a check or standing valve 14 and the liquidalready in the barrel, above the piston, is discharged around the uppercheck valve 6 into discharge pipe 5, said valve 6 traveling upwardly onhollow piston rod section 8 at the same time valve 11 and a ring-shapedcheck valve 15 are closed. The ring valve 15 has a seat 16 of annularconcave form onu per end of the annularly and internally thick enedlower end portion of the sleeve section 4 through which the ports 9extend.

The barrel 2 is an open'top barrel, and the diameter of all openingsabove check valve 6, l including the internal diameter of discharge pipe5, are large enough to permit the piston 10 and check valve 6 to bewithdrawn with the plunger and sucker rods from the well .having aremovable tapered fit in the itting 17 threaded on the lower end of thebarrel.

It will be noted that on the upstroke ofthe piston, the liquid is drivendirectly from the barrel into the tubing, thereby resulting in a maximumflow of liquid with a minimum resistance. It will also be seen that thecon-. struction is extremely simple and durable so as to be readilymanufactured and assembled with economy. Obviously, the lower end ofsleevel section 3 limits the openin of ring valve 15 to the properextent, and ne to the 'weight of the valves 6 and 15, they will seat bygravit lin an efficient manner and without the aid o seating springs. y

Minor changes may be made without departing from the spirit and scope ofthe invention as claimed i What I claim as new is In a double-actingpump for wells, a cylindrical barrel open at its upper end, well tubingof larger diameter than said barrel, a coupling sleeve embodying a lowersection threaded onto the upper end of said barrel, said lower couplingsleeve section having a horizontal internal annular valve seat and beingformed with axially extending intake ports in its lower end which openat their upper ends through said seat, said seat and said port directlysurrounding the upper end of said barrel, a downwardly seating ringvalve associated with said seat, said coupling sleeve further embodyingan upper section threaded into the lower section and having a horizontalinternal annular valve seat, said tubing being connected to said uppercoupling sleeve section, a hollow piston rod having a valved piston onits lower end working in said barrel and provided with outlets at itsupper end, a downwardly seating check valve slidably tted on the pistonrod and cooperating with the last named valve seat, the last named valveseat having an internal diameter greater than the diameter of thepiston, and said cheek valve having a diameter lesser than the internaldiameter of the tubing, to permit free upward removal. of the piston andthe check valve with the piston rod from the barrel and the tubing. v

In testimony whereof I ax my signature.

ANDREW' P. MORRIS..

